Oracle

Instance recovery: When the database suddenly crashes and the dirty data blocks in the buffer cache have not been refreshed to the data file, the running transactions are suddenly interrupted when the instance crashes, the transaction is in the

ORACLE partitioned tables and partitioned indexes ORACLE stores tables in segments for Partitioned Tables. Common tables are stored in one segment, while partitioned tables are divided into multiple segments, therefore, the process of searching for

After installing Oracle11g in Windows 7, seven services are displayed: Run-> services. msc. The ORCL or orcl in each service name is SID, namely System IDentifier, that is, the System IDentifier, and Db11g_home1 in OracleOraDb11g_home1ClrAgent is

517. Which of the following are true concerning block media recovery? (Choose all that apply .) A. Any gap in archive logs ends the recovery. B. If a gap in archive logs is encountered, RMAN will search forward for newer versions of the blocks that

Oracle RAC client failover (failover). When using the TAF method, the client that has established a connection does not need to send a connection request again when the connected instance or node fails, the previous database operations can still be

1. Oracle 11g R2 installation manual (Graphic tutorial) For Windows Before installation, you must confirm the following points: There is no problem with your memory (this is very important, if your machine is often blue screen, then don't install it,

My friend asked: In one school, the oracle database is encoded as GBK, and there is already a lot of production data in the database. Now I want to change it to UTF8. What problems will happen if I perform this step?My answer: Because the utf8

When a certain part is used multiple times in a query, you can use the Oracle with statement to create a public temporary table. Because the subquery in the temporary memory table avoids repeated parsing, the execution efficiency will be improved a

In Oracle10g, full-text indexes of the context type can also be automatically synchronized. Two new synchronization methods are introduced in 10 Gb. Currently, three synchronization methods are available. 1. ctx_ddl.sync_index2. sync (on commit)3.

First understand under what circumstances Oracle will generate a ORA-01555 error:Assume that there is A 60 million-row data testdb table. It is expected that it will take two hours to scan the entire table. The reference process is as follows: 1. At

1. View All permissions (system permissions, object permissions, and roles) of a specified user in three views: dba_sys_privs, dba_tab_privs, and dba_role_privs. Script: query_user_privs. SQL 2. Obtain the DDL statements granted by the specified

Recently, the project encountered such a problem. The requirement is similar to the following. There are two tables: Table 1 (test) Table 2 (test2) Description Table 1 stores the scores of each course and table 2 stores the total scores of the

Clean up the environment of undo tablespace management Test 1: Http://blog.csdn.net/wanghui5767260/article/details/20145959 SYS @ ORCL> select tablespace_name, segment_name, status from dba_rollback_segs; TABLESPACE_NAME SEGMENT_NA STATUS ----------

Environment:Platform: RedHat EnterPrise 5.8 X86_X64Database: Oracle EnterPrise 11.2.0.3Cluster software: Oracle grid 11.2.0.3 Fault symptom:An archive failure occurs in the database, and an instance of one node is HANG dead. The log information is

I. Shared Server Mode working mechanism: Shared server mode (also called MTS Multi-Threaded Server ): After the database is started, there will be two more processes than the dedicated server mode. One is the scheduling process (dispatcher) and the

1. First download and install Navicat for Oracle (here you can download) and install the software. next, you can. 9.0.15 registration code: NAVP-J88X-4H3M-9YFP NAV8-UVYK-U3RQ-WNVX NAVE-H2CW-7RPE-YFVJ2. Establish a connection (Select sid, and enter

LabDatabase data files with Backup Recovery ORA-01157 [continued + 1] YesBackup availableThe experimentHow can I recover without backup?? The prerequisites for this experiment must be in archive mode !!! However, after testing, we found

This problem has been entangled in me for a whole morning. The key issue is not that there is no way but that the method is not correct! I initially followed this

Introduction: When the typical installed SDE and database cannot achieve the desired efficiency by default, the SDE and database should be reconfigured as needed to achieve satisfactory results. For example, when a database table is too large, it is

Logical standby is built on physical standby Oracle10g Physical DataGuard detailed construction process -- Stop the log application on standby SQL> alter database recover managed standby database cancel;Database altered. -- Modify the